.message-board {
    width: 550px;
    background-color: #FE7E50;
    .board {
        border-bottom: 4px solid green;
        .message {
            width: 400px;
            height: 300px;
            margin-left: 53px;
        }
        .check {
            margin-left: 460px;
        }
        .send {
            width: 50px;
            margin-left: 460px;
            margin-bottom: 10px;
        }
    }
}